Northrup is a very American Company, but the technology using light weight carbon fiber panels, especially on the rudders and tail seem to be the purview of the Europeans.
Given that capacity is directly connected to the net weight of the aircraft, and lift to power, we will have half and the Europeans the the other. The combination meets the specs, which Boeing could not do for some reason.
Anyhoo, gonna be fully retired in a few very short years at 65, and I'm happy Northrup go the contract.
Even at the also very American Avondale Shipyard's where I once worked, we had plenty of German and French tech that we built American ships with. It is a global world today and it has been for a long time.
Yup, maybe the euro'S will buy (more) f35's now.